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Replace repeated var_decls with nop

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This commit is contained in:
Ilmir Usmanov
2014-08-05 14:52:03 +04:00
parent 3b624be051
commit bfe2293d43
3 changed files with 59 additions and 25 deletions
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src/liboptimizer/optimizer-passes.c
+31 -3
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@@ -322,6 +322,7 @@ optimizer_reorder_scope (uint16_t scope_start, uint16_t scope_end)
OPCODE *first_opcode = opcodes + scope_start;
OPCODE *last_opcode = opcodes + scope_end;
OPCODE *current_opcode, *processed_opcode = first_opcode;
OPCODE *var_decls_start;
for (current_opcode = processed_opcode; current_opcode != last_opcode; current_opcode++)
{
@@ -374,13 +375,40 @@ optimizer_reorder_scope (uint16_t scope_start, uint16_t scope_end)
current_opcode++;
}
var_decls_start = processed_opcode;
for (current_opcode = processed_opcode; current_opcode != last_opcode; current_opcode++)
{
if (current_opcode->op_idx == NAME_TO_ID (var_decl))
{
optimizer_move_opcodes (current_opcode, processed_opcode, 1);
optimizer_adjust_jumps (processed_opcode + 1, current_opcode + 1, 1);
processed_opcode++;
// If variable already declared, replace it with nop
bool was_decl = false;
if (var_decls_start->op_idx == NAME_TO_ID (var_decl) && var_decls_start != current_opcode)
{
OPCODE *var_decls_iterator;
for (var_decls_iterator = var_decls_start;
var_decls_iterator != processed_opcode;
var_decls_iterator++)
{
JERRY_ASSERT (var_decls_iterator->op_idx == NAME_TO_ID (var_decl));
if (var_decls_iterator->data.var_decl.variable_name
== current_opcode->data.var_decl.variable_name)
{
was_decl = true;
break;
}
}
}
if (was_decl)
{
current_opcode->op_idx = NAME_TO_ID (nop);
}
else
{
optimizer_move_opcodes (current_opcode, processed_opcode, 1);
optimizer_adjust_jumps (processed_opcode + 1, current_opcode + 1, 1);
processed_opcode++;
}
}
}
}